Crank throw grinding device



March 21, 1939.

4 Y J l) J. P. MORRIS CRANK THROW GRINDING DEVICE Filed Dec. 24, 1937 2 Sheets-Sheet l March 21, 1939. J P MORRIS CRANK THROW GRINDING DEVICE 2 Sheets-Sheet 2 Filed Dec. 24, '1957 Patented Mar. 21, 1939 UNITED STATES PATENT OFFICE 2,151,139 r CRANK 'rnaow GRINDDIG nnvrcn John P. Morris, La Grange, Ill. Application December 24, 1937, Serial No.181,650

'1 Claims. (01. 51-241) My invention relates to a device for grinding device is secured to the part of the crank shaft the throw or connecting rod portion of a crank shaft and more especially the connecting rod receiving portions of the crank-shaft of a Diesel locomotive, as for example of the Winton V-type engine.

The invention has for its object the provision of a device whereby the connecting rod'receiving portions of the crank shaft maybe ground and 1 trued without necessitating the removal of the crank shaft from the engine and therefore withoutnecessitating a more or less complete dismantling of the engine as has heretofore been Figure =2 is a side'elevation of my improved device with an intermediate portion broken away andpther'p'ortions shown in section and the devicesh'own appliedto one throw of a crank "shaft ofwhi'ch'only a'portion' is shown.

'Figure 3 a a perspective view of the lower or grinding portion of the device.-

Figure 4 is a detail sectional 'view of the lower 35 end of the device, with the grinding wheel and t its arbor omitted, soas toillustrate construction,

and methodv of. mounting the arborcarrying bracket or block. 4 .In then-particular exempliflcation of the invention asuitable frame element 10 is employed for mounting a grinding tool or wheel adjacent one end. The grinding wheel holding-end of a.

the frame is adapted to rest on and-be secured about the crank-throw or connecting rod bearill may be in simulation of a connecting rod provided at its lower end with a semi-circulars ocket I I adapted to receive the connectingrod 3 bearing I2 of the crank shaft; The frameof the throw or connecting rod receiving portion l2 which needs no truing by means of the semicylindrical' cap member l3 adapted to fit about the opposite side of the crank shaft throw I2; 5

.' the member l3 being secured to the main frame greater diameter than the diameter of 'thethrow oi the crank shaft to permit the insertion ofsuitable bearing elements I5, see Figures 1 and. 2.

The lower socketed end of the frame I0 is of width less than the length of the connecting rod receiving hearing or throw 'portion' l3 of the crank shaft, see Figures 2 and 3', to permit the grinding element or wheel to engage the uncovered portion of the connecting rod bearing or throw of the crank shaft and for that reason the bearing cap l3 at one side is shown provided at with a semi-cylindrical extension l6,'see Figures 2 and 3, adapted to extend about the lower side of the-crank shaft throw portion to be' trued. In other words, the width-of the bearing cap [3 with its semi-cylindrical extension 16' approxlmates the length of the connectingrod bearing of the crank shaft between the crank armsv I|,

I I in order to maintain the device with its grinding element in position for operation on the exposed portion of the connecting rodbearing or crank shaft throw and to induce a truing 01' onehalf of the throw in keeping with thehalf or portionencircled-by the frame anibearlng' cap, asshowninFigure.2.'

block 48 which-'is provided with a spindle IS on which an abrasivewheel 20 is loosely mounted.

The bracketla onits opposite side is provided with a pair of stud bolts 2|, 2| spaced apart and on opposite sides of the spindle-carrying axis- 40 .of bracket l8; and thesebolts pass through the frame i0 and have their outer ends providedwith suitable nuts and washers as at 22 in Figure 2. One of the openings in the frame for the passage of one of the stud bolts 2| is in the nature. of a vertically disposed -arcuate slot which permits 7 v the bracket l8 with its spindle l8 tobe vertically v Secured to the main frame II) is a bracket or 35 l The post 43 is provided with an opening extendwheel to receive nut 24 which screws onto the threaded end of the arbor and pulley member 23 as shown in Figure 2, thereby causing the wheel 20 to rotate and move with the arbor member 23. The inner end of arbor member 23 is enlarged and circumferentially grooved in the nature of a pulley 25 and is also provided with another groove 26; the pulley groove 25 being adapted to receive a suitable belt 21, while the groove 26 is adapted to receive the bifurcated end of the yoke or control member 28.

The adjusted position of the bracket or spindle carrying block I8 is controlled by a suitable cap screw 29 which is threaded. through an extension or bracket arm 30 disposed laterally from the main frame I0, see Figure 1.

The yoke or control member 28 at its upper end is provided with a tapped hole adapted to receive a feed-screw 3| which is rotatably mounted on a spindle 32 provided intermediate of its ends with a collar 33; the short end of the spindle 32 extends througha hole in the main frame Ill and this end of the spindle is threaded to receive a nut 34, which causes the collar of the spindle to be firmly drawn against the side of the main frame The feed-screw 3! at its inner end is enlarged and circumferentially grooved in the. nature of a pulley, as shown at 35 in Figure 2, to receive a suitable belt 36; while the outer end of the spindle 32 may be provided with a hole to receive a suitable pin to hold the feed-screw 3i against longitudinal movement on the spindle.

The belt 36 is disposed upwardly about an enlarged grooved portion or pulley 37 secured to a spindle 38 that extends loosely through the main frame In and is provided with a hand-wheel 33 whereby rotation of the spindle and its pulley 3'?! may be accomplished The spindle 38 is shown provided with a spacing collar 40 between the hand-wheel and the frame in order to maintain the belt holding end 31 in proper vertical alignment with the enlarged grooved end 35 of the feed-screw 3i.

As is'apparent, the turning of hand-wheel 39 will cause belt 36 to rotate the feed-screw 3i and induce the yoke or control member 28 to travel lengthwise of the feed-screw. This movement of the control member 28 will cause the arbor 23 with the attached grinding wheel -2ll to move lengthwise of the spindle l9 and consequently present the grinding wheel to different parts, namely to the entire half, of the connecting rod bearing or throw which is to be trued.

The upper end of the main frame Hi is provided with a suitable electric motor, indicated at 4|, whose shaft is shown provided with a stepped pulley 42'which receives the belt .27 whereby vided with a tool holding post 43, extending parallel with the grinding wheel holding arbor and the spindle IS on which the arbor is mounted.

ing transversely therethrough adapted to receive a suitable diamond point tool 44 for dressing grinding wheel 20, held in place by a set-screw 45 which screwsinto a tapped hole in the end of the post and arranged to intersect the tool receiving hole in the post. The method of holding 'the dresser tool enables easy introduction and removal of the tool.

wheel 20 is countersunk about the bore in the necessary, proper rotation of hand-wheel 39 will induce the desired rotation of feed-screw 3i,

causing control member 28 to travel toward the main frame and simultaneously shift arbor 23 with the grinding wheel 20 lengthwise of spindle I9, where the perimeter or grinding surface of the grinding wheel will be in contact with the dresser tool 44. During rotation of the grinding wheel, it is also caused to move back and forth along the spindle l9, through proper rotation of the hand-wheel 39, thereby presenting the entire perimeter of the grinding wheel 20 to the action of the dresser tool; this operation being continued until the perimeter of the grinding wheel runs true; a resetting of the diamond point dresser being necessary during the dressing operation.

My improved device is especially intended for truing or grinding the connecting rod bearings of the crank shaft of a Diesel locomotive using the V-type Winton engines and is designed to perform this operation, provided one-half of the bearing or throw is true, without the necessity of completely dismantling the Diesel locomotive and without pulling out the crank-shaft which entails a great expense and the loss of considerable time.

In practice, the connecting or piston rods connected to the same throw or rod bearing of the crank shaft, of which one-half or part needs to be ground, are removed, as well as the bushings or liners of the cylinders and the bottom pan or cover of the crank case. My improved device is then inserted through the upper end of the cylinder with the lower semi-circular end in engagement with the true half or end of the crank shaft throw or connecting rod bearing [2, and the abrasive tool ,or grinding wheel 20 adjusted (by means of screw 29) to properly contact the uncovered and untrue end of the connecting rod bearing [2 of the crank shaft. The other semicircular member or cap bearing i3 is then placed about the lower side of the connecting rod bearing [2 and fastened in place by bolts l t, with the extended portion of this cap bearing I3 disposed beneath the part to be operated on to act as a spacer and maintain the device on the true portion or end of the crank-shaft hearing or throw The frame ID of the device, as previously stated, preferably consists of a singleelongated narrow member of length somewhat greater than the distance from the top of the cylinder to the crank .shaft bearing l3 when the latter is at the lowest point in its revolution, in order that the upper motor holding end as well as the hand wheel 39, of the mechanism for controlling the grinding wheel holding arbor, will be disposed above the upper end of the cylinder during the entire grinding operation.

In order that the device may be maintained in proper position and out of contact with the cylinder wall, I prefer to place a cross bar 46 across the top of the cylinder; the cross bar at \opposite ends being provided with openings the'rethroughso that it may be inserted over some of the stud bolts 41 of the cylinder and be held in place as shown to the left in Figure 1.

In locomotives of the type mentioned, the crank shaft of the Diesel engine is operatively connected with a suitable electric generator. This operative connection is left undisturbed during the use of my device in grinding crank shaft bearings. The device having been applied as described, the

electric motor M at the top of the frame is then 7 energized so that it willproperly drive belt 21 and thereby rotate the grinding wheel at a predetermined speed; and at the same time the generator. (not shown) which is 'operatively connected with the crank shaft. of the Diesel engine is .also motorized so as to turn the crank shaft of the Dieselen'gine to revolve at a suflicient speed.

My improved devicebeing connected with the' connecting rod bearing of the .crank shaft will reciprocate in the cylinder. with the grinding wheel in grinding relation with the crank shaftbearing during rotation and as a result the entire circumference of one end or half of the crank shaft bearing will be presented to the action of. the grinding wheel. In order that the entire 'uncovered end of the crank shaft bearing may be acted upon, the operator will turn'hand Wheel 39 thereby causing rotation of the set screw 36 which induces yoke member 28. to travel the grinding face of the abrasive wheel runs true.

If the opposite end of "the crank shaft bearing it from that shown in Figure 2 is to be ground true, it' will be understood that the device. is re-v versed from the position shown in Figure 2. If

both ends of the bearing have become untrue,

"the entire crank shaft will then have to be replaced.

I have described my device as especially applicable for-use in grinding the throws or connect-.

is believed to be its best embodiment and has been describedin terms employed merely-as terms of. description and not as terms of limitation, as structural modifications'may be made without,

however, departing from the spirit of my mounted on the spindle; and power means disinvention.

What Iclaim is: l 1. A device of the character described comprising anelongated narrow frame adapted to be inserted in .the cylinder of a V-type engine and to extend from the crank shaft'to the exterior of v the top of the cylinder, while the lower end of the frame terminates in a semi=circular portion;

adapted to engage thepiston-rod bearing'of the crank shaft; a semi-circular bearing adapted to match theopposite side of the piston-rod bearing of the crank-shaft and to'removably secured to the semi-circular portion ofsaid frame, said bearing cap extending beyond the side m the frame coextensive with the length of the pistonrod bearing of. the crank shaft; power 1 means arrangedat the upper endof said frame a' grinding. wheel holding arb rotatablymounted onthe frame so as-to be" "posedabove and in spaced relation withthe extended end. of

said hearing cap; said arbor being also adapted Ito move in a direction parallel with,s'aid bearin cap; -m'ean's intermediate of the power means and said' 'arbor whereby-the arbor and grinding wheel may be rotated; and means'mounted on said frame and having operative connection with,

said arbor whereby the arbor with the associated grinding wheel may be made to travel laterally while being rotated.

2. A device of the character described comprising an elongated frame adapted to be inserted through the cylinder of 'an internal combustion engine, the lower" end of the frame being provided with a crank shaft bearing encircling DDT-1 tion the lower part whereof is provided with a lateral extension whereby the frame is held against lateral movement; a grinding wheel rotatably and adjustably mounted on a horizontally disposed arbor at the lower end of the frame adjacent .said bearing encircling portion and above said lateral extension; means whereby said wheel is caused to travel laterally and power means disposed'at the upper end of the frame and operatively connected with the grinding wheelwhereby the latter'is rotated.

3..A device of the character described comprising an'elongated frame adapted to be inserted through the cylinder of a multi-cylinder engine, the lower end terminating in a crank frame to maintain the latter on the true end of the. throw; a vertically disposed grinding wheel rotatably mounted on the frame above the extended end of said bearing cap; grinding wheel arbor carrying means adjustably secured to said frame whereby the grinding wheel may be adjusted in a vertical direction; and power means disposed at the upper end of the frame and operatively connected with the grinding wheel arbor whereby the latter may be rotated.

4. A device of the character described comprising an elongated frame'adapted to be inserted through the top of the cylinder vof a multi-cylinder engine, the lower end thereof being provided with a crank-shaft throw encircling and frame positioning portion; a vertically adjustable spigdle carrying block secured to the frame above sai encircling portion, said block being provided with a laterally disposed spindle; a vertically disposed grinding wheel rotatably and 'slidably crank-shaft throw encircling portion; a spindle secured to the frame; a grinding wheel rotatably and slidably mounted on the spindle; means, operative from the upper end of the frame, whereby movement of the grinding wheel lengthwise of the spindle may be controlled; and power 'meansa'rranged at the upper end of the frame and operatively connected with the grinding wheel whereby the latter may be rotated.

6. A device of the character described comprising an elongated frame adapted to be in-.

serted in the cylinder of an internal combustion 'engine', thelower end thereof being. provided with a crank shaftencircling portion; a spindle carry ing block adjustably secured to the frame; a

grinding wheel carrying arbor rotatably and slidably mounted on said spindle; a feed-screw securedto the frame and adapted to be rotated;

-screw and the arbor to travel lengthwise of said spindle; means whereby said feed-screw may be rotated; and power means arranged at the upper end of h the frame and operatively connected with said arbor whereby the latter may be rotated.

7.,A device of the character described comprising an elongated frame adapted to be inserted in the cylinder of an internal combustion engine, the lower end. oflthe frame terminating in a semi-circular crank shaft engaging portion; a bearing cap adapted to fit about the opposite side of the crank shaft and to be removably secured Patent No. 2,151,159,

JOHN P., HORRISO CERTIFICATE OF CORRECTIONB to the lower end of the frame, said bearing cap being adapted to extend beyond the side of the crank shaft engaging portion of the frame; a

spindle carrying block adjustably secured to the by the latter and the grinding wheel may be rotated. 7

JOHN P, MORRIS.

March 21, 19390 It is hereby certified that error appears in the printed specification of the above numbered. patent requiring correction as follows: Page 5 first column, line 61, claiml', before the word rerrrovebly insert be; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Offices- Signed and sealed this 16th day of mey AD D}, 1939b (Seal) Henry Van Arsdalie Acti Qieeioner of retenteo and operatively connected with said arbor where- 

